I recently tried to replace an sealed cartridge bottom bracket with a threaded hollowtech system. In the process I shredded one of the threads and can't get the hollowtech cup in. After some study I noticed pressfit bottom brackets are compatible with hollowtech. Is it possible to install a pressfit BB into a threaded frame?
You can't put a pressfit bottom bracket in a frame not designed for pressfit bottom brackets.
Your best options are:
Its WAY cheaper and arguably easier to get a shop to re-face and tap your Bottom Bracket shell than to get the Velo-Orange BB--though its a VERY cool product that every shop ought to have!-- and a new set of cranks. If you're good with threads, you CAN chase the threads, I'd try to install the "good" Hollowtech cup first, slide the bb spindle all the way through, then carefully try to rethread the damaged cup using the spindle as sort of a guide. Try to find the opening of the original thread and match it with the bb cup's starting thread.
In a pinch, if its the non-drive-side and the old cartridge bb uses a plastic retainer type sleeve that threads in, you could force that back in. It'll damage the plastic threads but it'll do its job of keeping the bb in place, even if it follows the "new threads." I'd be VERY surprised if that vibrates out! LBS might even have one off a throwaway, but I I've never tried to mix match, so I don't know if they'll fit any cartridge bb.
They DO exist, but the only proof I've found is an ended ebay auction from a year and a half ago, likely discontinued by YST. If you contact the seller, you might find out where they got them or if they have more, but I doubt they'll show up on the market before next fall..